半群 Oεn的极大幂等元生成子半群
Maximal Idempotent-Generated Subsemigroups of Semigroup Oεn
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摘要: 设Oεn是Xn上的保序且升序变换半群,对橙 n≥3,研究了半群Oεn的极大幂等元生成子半群的结构,证明了半群Oεn的极大子幂等元生成子半群 S有且仅有两类:S=Oεn\{∈}和 S= In-2∪{∈}∪ Gm (1≤ m≤ n-1),其中 In-2={α∈Oεn :|im(α)|≤ n-2},Gm={α∈Oεn :|im(α)|= n-1,mα= m},∈是集合Xn上的恒等变换。
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关键词:
- 保序、极大子半群、极大幂等元生成子半群
Abstract: Let Oεn be the semigroup of all increasing and order-preserving full transformations on Xn .For arbitrary n such that n≥3 ,the structures of the maximal idempotent-generated subsemigroups of the sem-igroup Oεn were studied .The authors have proved that the semigroup Oεn has exactly two classes of maxi-mal idempotent-generated subsemigroups :S=Oεn\{∈}and S= In-2 ∪{∈}∪ Gm(1≤ m≤ n-1) ,where In-2 ={α∈Oεn :|im(α)| ≤ n-2},Gm={α∈Oεn :|im(α)|= n-1 ,mα= m},∈is the identity on Xn . 期刊类型引用(1)
1. 胡华碧,赵平. 半群T_(n, r)的极大(正则)子半群的完全分类. 西南师范大学学报(自然科学版). 2021(06): 5-8 . 本站查看
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